Mill fob



W. H. HOPE.

Grain Mill.

No. 22,807. Patented Feb. 1, 1859.

vwoza N. PETERS. Pmlo-mhn n mr. Washinglon. 0.0.

i in

run tr w MILL FOB GRINDING GRAIN.

Specification of Letters Patent No. 22,807, dated February 1, 1859.

To all whom it may concern:

Be it known that I, 7M. H. .Horn, of the city of Washington, District ofColumbia,

have invented a new and useful portable mill for cutting, crushing, andgrinding corn on the cob, grinding all kinds of grain into meal andflour, and grinding roots, herbs, bark, spices, plaster, 0yst er-shell,etc; and I do hereby declare the following to be a full and exactdescription thereof, reference being had to the accompanying drawingsand to the letters of reference marked thereon.

The object .of this invention is to obtain a cheap and durable portablemill that with a small power will be capable of doing all the grindingnecessary for a large farm or plantation or neighborhood in regions ofthe country where water and other power is scarce.

The nature of this invention consists in making a triplicate mill, ofcylinders running in concaves for the purpose of grinding differentmaterials. Also in the mode of setting the stone and cylinders for thepurpose of grinding coarse or fine as the case may require.

To enable others skilled in the art to make and use my invention, I willproceed to de scribe its construction and operation.

In the drawings, Figure 1 represents the exterior of the mill inperspective; Fig. 2 as used when grinding flour or corn meal, Fig. 3, asused when cutting, crushing and grinding corn on the cob or othermatter, as food for cattle, etc. Fig. 4 shows the periphery of therunning stone, and Fig. 5 the interior of the concave stone.

A is the frame stoutly made of some hard, durable wood, BB covers forthe mill, with hopper h to be used when the corn cob crusher and cutteris not attached.

SS are hollow cast iron cylinders 10 inches in diameter with teethrunning the whole length of the cylinder 2% or 3 inches long, l\-shaped,one inch thick at their base, running to a sharp edge, on cylinder Swith a downward inclination, and on cylinder S" inclining upward. Theseteeth are so set as to fit in each other when required, and made long soas to be sharpened when dull. Cylinders SS are operated by cogs attachedeach at one end of each, or by a band I)" as shown in the drawings.These cylinders are at tached to a stout cast iron frame F and run injournal boxes, box I; is fastened firmly to E frame F, while box 6 isattached to the end of screw lever Z and moves on a stout plate for thepurpose of cutting and crushing coarse or fine as may be desired. FrameF with cylinders SS, are arranged so as to be detached from frame A whenthe mill is not needed as a corn and cob crusher and cutter.

- On the bottom of the frame F are four iron pins which fit in platesfastened on top of frame A, said plates having holes in them to receivesaid pins. On frame A are two hooks (Z which fit over projections onframe F. Said pins and plates, and hooks and projections are used forthe purpose of attaching frame F firmly to frame A when required. 8 is ahollow cylinder made of chilled cast iron, one foot (12 inches) indiameter and 16 inches, more or less, across, having teeth orcorrugations V as represented in the drawings, said cylinder runs in aconcave chilled cast iron plate 79, having teeth or corrugations similarto those on cylinder .9.

C is a perpendicular stone, made of bur mill stone, running in a concaveC of same material. Stone 0 has indentations or V or U-shaped cuts orfurrows, about four inches apart, and one inch wide, as shown on itsperiphery, said periphery being the grinding surface of stone orrunnerC. An iron shaft runs through stone C fitting into 1novable journalboxes 0 at each end, said journal boxes are attached to screw levers Z,and move on iron ears, or lugs, attached to frame A, said journal boxeshave slots near their base into which is fitted the ears or lugs. Thescrew levers Z regulate or set the stone for grinding fine or coarse.Concave C is made of bur mill stone and spans, within a fraction,one-half the running stone C, this concave is one inch wider than therunner, and six inches more or less through. The concave O at its upperend is 1%; inches thinner, than elsewhere, tapering down some 6 inches,it has on it, at its upper end, from three to five indentations orfurrows, similar to those on the runner C. On each side of the concaveis a stout board of hard wood, shown by dots, said boards are bolted tothe concave, said concave C is held in its place by two stout iron rodsfitted in it, and held to the casing by cars or lugs r, the concave ismade thus movable so that it may be easily taken out when it isnecessary to sharpen the stones or repair the mill.

In the outer casing 0, is a door 9 for the admission of a spout or chutew, which spout or chute is fastened to the bottom of the cast ironconcave plate p, when the stones are not in use for the purpose ofrunning out of the mill the material ground by the cutters, crushers,iron cylinder and concave, 'w is a spout at the bottom of the mill forthe egress of the ground grain.

On to the ends of the shafts of cylinder 8 and stone C are pulleys, forthe band which connects and operates said cylinder and stone, alsopulleys for driving the same.

The speed of the stone O should be about 450 or 500 revolutions perminute. The speed is regulated by the size of the cog wheels andpulleys. The runner, or perpendicular stone O is two feet in diameterand from 10 to 12 inches thick.

The whole of the grinding apparatus is inclosed in a stout casing 0 asshown in F 1.

The main shaft is 4 feet long (made of wrought or cast iron), on whichthe run ning stone rests, said stone being placed 6 inches from one endof the shaft, the pulleys by which the power is applied, is on the otherend of the shaft and 3 inches less in diameter than the stone, O.

Levers Z, which are used for setting the stone and cylinders, arefastened at one end to the journal boxes in which the shafts run, saidjournal boxes have grooves on their sides, near the bottom, into whichthe ears or lugs of the boX fastened on frame A fit, the journal boxesmoving on said lugs or ears. On the other end of levers Z are stoutscrew threads fitting in female screws 2, said female screws haveflanges on their outer edge, which flanges fit in a plate fastened toframe A, which plates firmly hold the female screws, the said femalescrews have pins or handles firmly attached to them for the purpose ofmoving them, and thereby regulating the stone C and cylinders SS. Nearthe journal boxes are thumb screws 3 for the purpose of holding levers Zwhen the stones are set. f is a slide for the purpose of regulating thefeed from the hopper h when the mill is used for grinding flour or cornmeal.

w a; w x are driving pulleys for giving motion to the stone andcylinders.

Operation: In operating this mill, when used for crushing, cutting andgrinding corn on the cob, frame F, with cylinders SS, is attached to themain frame A, chute or spout 'w is placed as shown in the drawings, thecorn on the cob is thrown into the hopper h and the corn and cob, cut,crushed, and ground up together. When the mill is needed for grindingsuch substances as coffee, spices, roots, herbs and food for cattle, theframe F is removed, chute to left in place, covers B B closed over themill and the material to be ground thrown in hopper it. The cylinders SSmay remain, or be removed, in using the mill for any kind of grinding,at the will of the operator. When the mill is used for grinding corn andwheat into fiour and meal, chute or spout w is removed, door g closed,the corn, or Wheat thrown into hopper it, which falls on cylinder 8where the grain is cracked, or partly ground, and passes on to stone C,where it is ground into any quality of flour, or meal at the will of theoperator. When the mill is not used for grinding flour or fine cornmeal, the stone or runner O is ungeared and remains stationary.

hat I claim and desire to secure by Letters Patent is 1. The combination'of a cylindrical corn and cob cutter and crusher, for grinding food forcattle, with two sets of grinding surfaces, arranged and operatingsubstantially as and for the purposes set forth.

2. I claim the arrangement by which the cylindrical rollers, or cuttersand crushers.

and grinding surfaces, may be operated together, or separately, and forthe purposes set forth and described.

3. The mode of regulating the cylinders and stone, for the purpose ofgrinding coarse or fine, by the use of the screw lever Z, attached tothe journal boxes 6, which move on ears or lugs firmly attached to frameF, in the manner described and specified.

WM. H. HOPE.

Witnesses:

LE FLOCHE, SAUBER SOHMIDT.

